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Finding the Fourth Proportional to 846.48, 1,267.86 and 520.86

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Solution

The fourth proportional to 846.48, 1,267.86 and 520.86 is: 780.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.48 : 1,267.86 = 520.86 : x
  2. Step 2: Convert to fraction form
    846.48/1,267.86 = 520.86/x
  3. Step 3: Cross multiply
    846.48x = 1,267.86 × 520.86
  4. Step 4: Simplify right side
    846.48x = 660,377.56
  5. Step 5: Solve for x
    x = 660,377.56/846.48
  6. Step 6: Final answer
    x = 780.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.